Problems solved with TS808

[chillhuman]

I just wanted to get this archived for anyone new like me who may be having trouble with their build - I was  having trouble with a TS808 build, and the problems I was seeing were funny voltages on some of the IC pins, they were all reading about 8.3V, which is way off. Same thing with one of the transistors.

If you are seeing crazy voltages, pop out the chip and check the pins in the socket. Once I got the 4558 out of there, the pins which were supposed to, actually read at Vr, which meant that the chip had gone south. Use sockets!, because it makes a check like this quite easy. Also, I think that for me, in the future I will be checking the voltages of all the sockets before I ever populate them. This is basic common practice for guitar amp building, as 400V can toast a tube, but low voltage can just as easily toast a chip.

I'm sure you big fish out there already know this, but hopefully this can help a newb like me get a new project working.

I used 2 different diodes, and the waveform clips differently on the top and bottom portion of the waveform on the scope, listening test will be performed tonight!

[petemoore]

  Yupp...I should be doing that again with a DIST+.
  It's on a PCB toney sent me, I checked everything and traces with close in light and Mag Glass...I'm just going to buy a new one and stick that in there and see what the voltages do..
  Either way is a fine debugging technique.
  I'm certain what will blow a chip is putting it in upside down, I don't think I've blown any with other methods @9V...but if it is possible, the way you described will tend to save chips.